//#include <MIDI.h>
//on the janky midi connector I wired:
// yellow is pin 4 > voltage 5V
// red is pin 5 > Data Tx
// blue is pin 2 > Sheild (ground)

// For most boards you can use:
// MIDI_CREATE_DEFAULT_INSTANCE();
// Where MIDI_CREATE_DEFAULT_INSTANCE() is short for MIDI_CREATE_INSTANCE(HardwareSerial, Serial, MIDI);
// but we need to use 'Serial1' for the ATMEGA4809 (Nano)
// The following line compiles in Arduino IDE when using MIDI_Library, but not in Wokwi :-/
//MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDI);
// The above is a workaround to the bug being tracked here:
// https://github.com/FortySevenEffects/arduino_midi_library/issues/300
// Once the bug is sorted, we can go back to using MIDI_CREATE_DEFAULT_INSTANCE(); for the Nano



const int buttonPins[3] = {2, 3, 4};
const int buttonPinCount = 3;
const int ledPins[3] = {A5, A4, A3};
const int ledPinCount = 3;
// MIDI change control from: https://downloads.neuraldsp.com/file/quad-cortex/Quad+Cortex+User+Manual+2_0_0.pdf
// button:Trigger -- A:35, B:36, C:37, D:38, E:39, F:40, G:41, H:42
const int midiControlChange[3] = {35, 36, 37};
const int midiChange = 0;

int buttonState[3] = {HIGH, HIGH, HIGH};
int lastButtonState[3] = {HIGH, HIGH, HIGH};   // the previous reading from the input pin

unsigned long lastDebounceTime = 0;  // last time output pin was changed
unsigned long debounceDelay = 50;    // debounce time, increase if the output flickers

void doStuff(int pinOn) {
  //switch off all LEDs
  for (int i = 0; i < ledPinCount; i++) {
    digitalWrite(ledPins[i], LOW);
  }
  digitalWrite(ledPins[pinOn], HIGH);
  //MIDI.sendControlChange(midiControlChange[pinOn], 0, 1);
}


void setup() {

  // set pin modes
  for (int i = 0; i < buttonPinCount; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }

  for (int i = 0; i < ledPinCount; i++) {
    pinMode(ledPins[i], OUTPUT);
  }
  //MIDI.begin();
  Serial.begin(9600);
}

void loop() {
  for (int i = 0; i < buttonPinCount; i++) {
    int reading = digitalRead(buttonPins[i]);

    if (reading != lastButtonState[i]) {
      lastDebounceTime = millis();
    }

    if ((millis() - lastDebounceTime) > debounceDelay) {
      // if the button state has changed
      if (reading != buttonState[i]) {
        buttonState[i] = reading;

        // only toggle the LED if the new button state is HIGH
        if (buttonState[i] == HIGH) {
          Serial.println("Do stuff");
          doStuff(i);
        }
      }
    }
    lastButtonState[i] = reading;
  }
}